Byte sequencing protocol for an asynchronous data transmission s

Details Byte sequencing protocol for an asynchronous data transmission s Byte sequencing protocol for an asynchronous data transmission s

1996-12-17

1999-05-18

Le, Amanda

Pulse or digital communications

Transceivers

Modems

375370, 370472, 370474, 370476, 370509, 370522, H04J3/00

Patent

active

059057564

ABSTRACT:
A communication system that communicates between a base station and a mobile station over a wireless rf channel. The communication system uses a novel protocol for transmitting a data frame in which an 8-bit data byte is divided into two 4-bit data nibbles. Each data nibble is assigned a 4-bit sequence number to form a transmission byte. By determining the sequence number of any transmission byte or series of transmission bytes, the beginning and the end of a data frame can be determined. A CRC check indicates when a data frame has been received successfully. The protocol does not require the use of unique start-of-frame (SOF) and end of-frame (EOF) characters. Also, the system implements a majority vote algorithm that collects data from successively transmitted copies of a given data frame and performs a majority vote to determine a mostly likely received data pattern. The protocol allows the system to achieve an improvement analogous to a 1.5 to 2.5 dB increase in signal power over other transmission protocols that require the use of SOF and EOF characters to transmit a data frame.

REFERENCES:
patent: 5570356 (1996-10-01), Finney et al.
patent: 5721733 (1998-02-01), Wang et al.

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